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" Vim indent file
" Language: Kotlin
" Maintainer: Alexander Udalov
" URL: https://github.com/udalov/kotlin-vim
" Last Change: 7 November 2021
" 2023 Sep 17 by Vim Project (undo_indent)
if exists('b:did_indent')
finish
endif
let b:did_indent = 1
setlocal cinoptions& cinoptions+=j1,L0
setlocal indentexpr=GetKotlinIndent()
setlocal indentkeys=0},0),!^F,o,O,e,<CR>
setlocal autoindent " TODO ?
let b:undo_indent = "setlocal autoindent< cinoptions< indentexpr< indentkeys<"
" TODO teach it to count bracket balance, etc.
function! GetKotlinIndent()
if v:lnum == 0
return 0
endif
let prev_num = prevnonblank(v:lnum - 1)
let prev = getline(prev_num)
let prev_indent = indent(prev_num)
let cur = getline(v:lnum)
if cur =~ '^\s*\*'
return cindent(v:lnum)
endif
if prev =~ '^\s*\*/'
let st = prev
while st > 1
if getline(st) =~ '^\s*/\*'
break
endif
let st = st - 1
endwhile
return indent(st)
endif
let prev_open_paren = prev =~ '^.*(\s*$'
let cur_close_paren = cur =~ '^\s*).*$'
let prev_open_brace = prev =~ '^.*\({\|->\)\s*$'
let cur_close_brace = cur =~ '^\s*}.*$'
if prev_open_paren && !cur_close_paren || prev_open_brace && !cur_close_brace
return prev_indent + shiftwidth()
endif
if cur_close_paren && !prev_open_paren || cur_close_brace && !prev_open_brace
return prev_indent - shiftwidth()
endif
return prev_indent
endfunction
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